Re: help with non decomposed M:N

Sorry. Forgot OJB version : 1.0.3.

Ramzi Oueslati a écrit :
> Hi Armin,
>
> Thank you for your reply. Sure I can and here it is.
>
> This is when I try to update an already persisted instance of A :
>
> java.lang.NullPointerException
>    at 
> org.apache.ojb.broker.metadata.DescriptorRepository.getDescriptorFor(DescriptorRepository.java:409) 
>
>    at 
> org.apache.ojb.broker.core.MtoNBroker.getMtoNImplementor(MtoNBroker.java:129) 
>
>    at 
> org.apache.ojb.broker.core.PersistenceBrokerImpl.storeAndLinkMtoN(PersistenceBrokerImpl.java:989) 
>
>    at 
> org.apache.ojb.broker.core.PersistenceBrokerImpl.storeCollections(PersistenceBrokerImpl.java:924) 
>
>    at 
> org.apache.ojb.broker.core.PersistenceBrokerImpl.storeToDb(PersistenceBrokerImpl.java:1776) 
>
>    at 
> org.apache.ojb.broker.core.PersistenceBrokerImpl.store(PersistenceBrokerImpl.java:813) 
>
>    at 
> org.apache.ojb.broker.core.PersistenceBrokerImpl.store(PersistenceBrokerImpl.java:726) 
>
>    at 
> org.apache.ojb.broker.core.DelegatingPersistenceBroker.store(DelegatingPersistenceBroker.java:175) 
>
>    at 
> org.apache.ojb.broker.core.DelegatingPersistenceBroker.store(DelegatingPersistenceBroker.java:175) 
>
>    at my.test.dao.ADao.update(ADao.java:189)
>
> And this is when I try to get instances of A with auto-retrieve="true" 
> on M:N collections within A class mapping :
>
> java.lang.NullPointerException
>    at 
> org.apache.ojb.broker.metadata.DescriptorRepository.getDescriptorFor(DescriptorRepository.java:409) 
>
>    at 
> org.apache.ojb.broker.metadata.CollectionDescriptor.hasProxyItems(CollectionDescriptor.java:329) 
>
>    at 
> org.apache.ojb.broker.core.QueryReferenceBroker.retrieveCollection(QueryReferenceBroker.java:578) 
>
>    at 
> org.apache.ojb.broker.core.QueryReferenceBroker.retrieveCollections(QueryReferenceBroker.java:790) 
>
>    at 
> org.apache.ojb.broker.accesslayer.RsIterator.getObjectFromResultSet(RsIterator.java:481) 
>
>    at 
> org.apache.ojb.broker.accesslayer.RsIterator.next(RsIterator.java:275)
>    at 
> org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(QueryReferenceBroker.java:123) 
>
>    at 
> org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(QueryReferenceBroker.java:251) 
>
>    at 
> org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(QueryReferenceBroker.java:271) 
>
>    at 
> org.apache.ojb.broker.core.PersistenceBrokerImpl.getCollectionByQuery(PersistenceBrokerImpl.java:1367) 
>
>    at 
> org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(DelegatingPersistenceBroker.java:338) 
>
>    at 
> org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(DelegatingPersistenceBroker.java:338) 
>
>    at my.test.dao.ADao.findAll(ADao.java:114)
>
> ADao.update calls this :
>
> 185    Identity oid = broker.serviceIdentity().buildIdentity(A.class, 
> id);
> 186    A entity = (A)broker.getObjectByIdentity(oid);
> 187    entity.setAtt1(value1);
> 188    entity.setAtt2(value2);
> 189    broker.store(entity);
>
> and ADao.findAll calls this :
>
> 111    final Criteria criteria = new Criteria();
> 112    Query query = new QueryByCriteria(InnovationEE.class,criteria);
> 113    if (query != null)
> 114        results = broker.getCollectionByQuery(query);
>
> No problem at all with 1:1 or 1:N relationship.
>
> Thank you so much Armin.
> Ramzi Oueslati
>
> Armin Waibel a écrit :
>> Hi Ramzi,
>>
>> Ramzi Oueslati wrote:
>>> Hello everyone,
>>>
>>> I've been trying to use OJB lately but I'm a newbie and I'm stuck 
>>> with handling simple non decomposed M:N relationships.
>>>
>>> Here's my purpose :
>>> ...
>>> ***
>>>
>>> You might have noticed the collections auto-retrieve setting is set 
>>> to 'false'. If I set this setting to true in *A* class mapping, I 
>>> get a NullPointerException when I try to read instances of A.
>>>
>>
>> Could you please post this stack trace too?
>> Used version of OJB?
>> The class mapping seems to be ok.
>>
>> regards,
>> Armin
>>
>>> Furthermore, auto-retrieve set to false, I can read and add new 
>>> objects but I also get NullPointerExceptions when trying to update 
>>> an object already stored.
>>>
>>> Is there anything I'm doing wrong ? Please, do not hesitate to ask 
>>> me questions. Any help would be greatly appreciated.
>>>
>>> Many thanks.
>>> Ramzi Oueslati
>>>
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>>>
>>>
>>
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>>
>>
>
>
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